PL154151B1 - Three-pole very high-power fuse-base in particular for operation in association with a switch - Google Patents

Description

RZECZPOSPOLITA PATENT DESCRIPTION 154 151 POLAND

OFFICE

PATENT

RP

Additional patent to patent no. - pending: 87 01 09 (P. 263 603)

Priority-Application announced: 88 09 15

Patent specification published: 1991 1129

Int. Cl. 5 _H 0 _{1 H} 85/20 number

Creators of the invention: Jacek Pastuszko, Marian Pieper, Henryk Feller,

Jerzy Wilczek

Authorized by the patent: Zakłady Wytwórcze Aparatury Wysokiego Napieu "ZWAR", Warsaw (Poland)

High-power three-pole fuse base, especially for cooperation with a switch

The subject of the invention is a high power three-pole fuse base, in particular for cooperation with a medium voltage switch having an electrically controlled drive.

Known are three-pole fuse bases cooperating with switches, in which, after the fuse link burns out, the striker acts on the firing mechanism which activates the lock latch and opens the switch. The mechanical action of the striker takes place through the triggering mechanism on the connector drive.

Also known from the US patent description No. 3,621,431 is a solution in which a striker for a fuse link acts on a button of a microswitch located above the striker.

In the solution according to the invention, the fuse holder has two first and second sockets, on which three supporting insulators are fastened each with sets of jaw contacts, which also serve to attach fuse links and connections. On the first stand, at each supporting insulator, there is mounted a triggering mechanism containing a lever rotatably mounted in the stirrup. The lever is moved up through the fuse link striker or falls down when the fuse link is removed. The lever movement is transmitted through the insulating follower to the cam. The cam is rotatably mounted in the first base and acts on the microswitch button to switch its movable contacts. The microswitch is also attached to the first cradle. There is a tension spring between the cam and the first stand. A tension spring attaches to the cam near the action of the cam follower insulating.

It is advantageous if between the insulators there are insulating barriers attached to the supports. Further advantages are obtained when the normally closed contacts of the microswitches are connected in series and the ends of the circuit are brought out to a terminal block.

In the solution according to the invention, it is impossible to close the circuit of the switch cooperating with the fuse base, both in the absence of at least one of the fuse links and in the case of actuation of the striker of any fuse link. Basis

154 151 fuse according to the invention makes it possible to use fuse links of different lengths. The base can work in a vertical or horizontal position.

The subject matter of the invention is illustrated in an embodiment in the drawing, in which Fig. 1 shows the fuse holder in a side view, and Fig. 2 shows the fuse holder in a front view.

The fuse holder consists of two separate sockets, first 1 and second 2. Each of them has three resin insulators 3 with sets of jaws 4 and terminals 5. Between the insulators 3 there are insulating barriers 6 fixed by means of brackets 7 to the sockets 1 and 2. In addition, a firing mechanism comprising a lever 8, an insulating pusher 9, a cam 10 with a tension spring 14 and a microswitch 11 is mounted on the first base 1 at each support insulator 3, and the lever 8 is rotatably fastened to the stirrup 12, and the stirrup 12 is fastened to it. terminals 5 of the first base 1. The lever 8 has a stepped shape, so it can slide between the jaw contacts 4 in the absence of a fuse link. Additionally, the lever 8 is equipped with a slider 13 that facilitates the insertion of the fuse link to the base.

In the first support 1, a cam 10 cooperating with a microswitch 11 is rotatably mounted. The cam 10 is connected to the lever 8 via an insulating pusher 9, one end of which has a threaded catch enabling the adjustment of the cam position 10. The shape of the cam is selected experimentally so that only in one After a certain position, the button of microswitch 11 remains free (not pressed). The normally closed contacts of microswitches 11 are connected in series and the ends of the circuit are brought out to the terminal strip. Between the cam 10 and the first support 1 there is a tension spring 14 which changes the position of the firing mechanism after the fuse link has been removed.

When three functional fuse links are installed in the fuse holder, the contacts of microswitches 11 are closed and the circuit is closed. If any of the fuse links is missing or one of them is activated, the lever 8 changes its position downwards or upwards. The movement of the lever 8 is transmitted through the insulating pusher 9 onto the cam 10. The cam 10 rotates and acts on the button of microswitch 11 and causes opening of the circuit of the microswitches.

Claims (2)

Patent claims 1. High-power three-pole fuse base, especially for cooperation with a switch, containing a tripping system acting on a microswitch, characterized in that it has two first (1) and second (2) sockets, three sockets (1, 2) are fastened to each of the sockets. supporting insulators (3) with sets of jaw contacts (4) also used to attach fuse links and terminals (5), besides, on the first base (1), next to each supporting insulator (3) there is a triggering mechanism containing a lever (8) mounted in rotation in the stirrup (12), which is moved up by the fuse striker or falls down after removing the fuse link, the movement of the lever (8) is transmitted through the insulating pusher (9) to the cam (10), and the cam (10) it is rotatably fixed in the first tray (1) and acts on the button of the microswitch (11) by switching its movable contacts, while the microswitch is also attached to the first tray j (1), there is also a tension spring (14) between the cam (10) and the first support (1), it engages the cam (10) close to the action of the insulating pusher (9) on the cam (10). 2. The base according to claim The circuit as claimed in claim 1, characterized in that the normally closed contacts of the microswitches (11) are connected in series and the ends of the circuit are brought out to a terminal strip. Fig. 4 Publishing House of the Polish Patent Office. Circulation 100 copies. Price PLN 3,000